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subroutine lwu (kdlon,kflev,dp,plev,tlay,paer . ,aer_u,aer_t,co2_u,co2_up) c---------------------------------------------------------------------- c LWU computes - co2: longwave effective absorber amounts including c pressure and temperature effects c - aerosols: amounts for every band c transmission for bandes 1 and 2 of co2 c---------------------------------------------------------------------- c----------------------------------------------------------------------- c ATTENTION AUX UNITES: c le facteur 10*rg fait passer des kg m-2 aux g cm-2 c----------------------------------------------------------------------- c! modif diffusion c! on ne change rien a la bande CO2 : les quantites d'absorbant CO2 c! sont multipliees par 1.66 c! pview= 1/cos(teta0)=1.66 c----------------------------------------------------------------------- implicit none #include "dimensions.h" #include "dimphys.h" #include "dimradmars.h" #include "yomcst.h" #include "yomrad.h" #include "yomaer.h" #include "yomlw.h" #include "yomsw.h" #include "yomrdu.h" c---------------------------------------------------------------------- c 0.1 arguments c --------- c inputs: c ------- integer kdlon ! part of ngrid integer kflev ! part of nalyer real dp (ndlo2,kflev) ! layer pressure thickness (Pa) real plev (ndlo2,kflev+1) ! level pressure (Pa) real tlay (ndlo2,kflev) ! layer temperature (K) real paer (ndlo2,kflev) ! optical thickness of the aerosols c outputs: c -------- real aer_u (ndlo2,nir,kflev+1) ! absorber amounts (aer) real aer_t (ndlo2,nuco2,kflev+1) ! transmission (aer) real co2_u (ndlo2,nuco2,kflev+1) ! absorber amounts (co2) real co2_up (ndlo2,nuco2,kflev+1) ! idem scaled by the pressure (co2) c---------------------------------------------------------------------- c 0.2 local arrays c ------------ integer jl,jk,jkl,ja real co2c ! co2 concentration (pa/pa) real pview ! cosecant of viewing angle real pref ! reference pressure (1013 mb = 101325 Pa) real tx,tx2 real phi (ndlon,nuco2) real psi (ndlon,nuco2) real plev2 (ndlon,nflev+1) real zzz c************************************************************************ c---------------------------------------------------------------------- c 0.3 Initialisation c ------------- pview = 1.66 co2c = 0.95 pref = 101325. do jk=1,kflev+1 do jl=1,kdlon plev2(jl,jk)=plev(jl,jk)*plev(jl,jk) enddo enddo c---------------------------------------------------------------------- c 1.0 cumulative (aerosol) amounts (for every band) c ---------------------------- jk=kflev+1 do ja=1,nir do jl = 1 , kdlon aer_u(jl,ja,jk)=0. enddo enddo do jk=1,kflev jkl=kflev+1-jk do ja=1,nir do jl=1,kdlon aer_u(jl,ja,jkl)=aer_u(jl,ja,jkl+1) . + qextaer(ja)*paer(jl,jkl) enddo enddo enddo c---------------------------------------------------------------------- c 1.0 bands 1 and 2 of co2 c -------------------- jk=kflev+1 do ja=1,nuco2 do jl = 1 , kdlon co2_u(jl,ja,jk)=0. co2_up(jl,ja,jk)=0. aer_t(jl,ja,jk)=1. enddo enddo do jk=1,kflev jkl=kflev+1-jk do ja=1,nuco2 do jl=1,kdlon c introduces temperature effects on absorber(co2) amounts c ------------------------------------------------------- tx = sign(min(abs(tlay(jl,jkl)-tref),70.) . ,tlay(jl,jkl)-tref) tx2=tx*tx phi(jl,ja)=at(1,ja)*tx+bt(1,ja)*tx2 psi(jl,ja)=at(2,ja)*tx+bt(2,ja)*tx2 phi(jl,ja)=exp(phi(jl,ja)/cst_voigt(2,ja)) psi(jl,ja)=exp(2.*psi(jl,ja)) c cumulative absorber(co2) amounts c -------------------------------- co2_u(jl,ja,jkl)=co2_u(jl,ja,jkl+1) . + pview/(10*rg)*phi(jl,ja)*dp(jl,jkl)*co2c co2_up(jl,ja,jkl)=co2_up(jl,ja,jkl+1) . + pview/(10*rg*2*pref)*psi(jl,ja) . * (plev2(jl,jkl)-plev2(jl,jkl+1))*co2c c (aerosol) transmission c ---------------------- c on calcule directement les transmissions pour les aerosols. c on multiplie le Qext par 1-omega dans la bande du CO2. c et pourquoi pas d'abord? hourdin@lmd.ens.fr zzz=pview*(1.-omegaer(ja)) aer_t(jl,ja,jkl)=exp(-zzz*aer_u(jl,ja,jkl)) enddo enddo enddo c---------------------------------------------------------------------- return end